77091612 has 48 divisors (see below), whose sum is σ = 194557440. Its totient is φ = 23617728.

The previous prime is 77091589. The next prime is 77091629. The reversal of 77091612 is 21619077.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40089 + ... + 41967.

It is an arithmetic number, because the mean of its divisors is an integer number (4053280).

Almost surely, 2^77091612 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77091612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97278720).

77091612 is an abundant number, since it is smaller than the sum of its proper divisors (117465828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77091612 is a wasteful number, since it uses less digits than its factorization.

77091612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2162 (or 2160 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 77091612 is about 8780.1829138122. The cubic root of 77091612 is about 425.6007412197.

The spelling of 77091612 in words is "seventy-seven million, ninety-one thousand, six hundred twelve".